Written in a lively and readable style by the world's leading authority on the North Atlantic Treaty Organization and US-European relations, Defense of the West is the history of a transatlantic security relationship that has endured for over seventy years. This latest edition of a classic work looks at how developments inside NATO and European Union member states affect their ability to defend against external threats while preserving Western values, in the era of Trump and Brexit. Sloan frankly addresses the failures and shortcomings of Western institutions and member states. But the book emphasizes the continuing importance of value-based transatlantic security cooperation as a vital element of the defense and foreign policies of NATO and EU member states. At a time of heightened tension and political turmoil, at home and abroad, Stan Sloan's lucid and far-sighted analysis is more necessary than ever.